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# Python | Decimal logb() method

Decimal#logb() : logb() is a Decimal class method which returns the adjusted exponent of the Decimal value.

```Syntax:
Decimal.logb()

Parameter:
Decimal values

Return:
the adjusted exponent of the Decimal value.

```

Code #1 : Example for logb() method

 `# Python Program explaining ``# logb() method`` ` `# loading decimal library``from` `decimal ``import` `*`` ` ` ` `# Initializing a decimal value``a ``=` `Decimal(``'.9932'``)`` ` `b ``=` `Decimal(``'0.142857'``)`` ` `# printing Decimal values``print` `(``"Decimal value a : "``, a)``print` `(``"Decimal value b : "``, b)`` ` ` ` `# Using Decimal.logb() method``print` `(``"\n\nDecimal a with logb() method : "``, a.logb())`` ` `print` `(``"Decimal b with logb() method : "``, b.logb())`

Output :

```Decimal value a :  0.9932
Decimal value b :  0.142857

Decimal a with logb() method :  -1
Decimal b with logb() method :  -1

```

Code #2 : Example for logb() method

 `# Python Program explaining ``# logb() method`` ` `# loading decimal library``from` `decimal ``import` `*`` ` ` ` `# Initializing a decimal value``a ``=` `Decimal(``'3.14'``)`` ` `b ``=` `Decimal(``'321e + 5'``)`` ` `# printing Decimal values``print` `(``"Decimal value a : "``, a)``print` `(``"Decimal value b : "``, b)`` ` ` ` `# Using Decimal.logb() method``print` `(``"\n\nDecimal a with logb() method : "``, a.logb())`` ` `print` `(``"Decimal b with logb() method : "``, b.logb())`

Output :

```Decimal value a :  3.14
Decimal value b :  3.21E+7

Decimal a with logb() method :  0
Decimal b with logb() method :  7
```

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